Phonograph



3 SHEETS-'SHEET 1.

C1 "01 on a Patented Aug.-- 3, 1920.

I. B. GRIFFIN.

PHONOGRAPH.

APPLICATION FILED JULYZZ, 191a.

' Patelited Aug. 3, 1920.

3 SHEETS-SHEET 3.

I To all whom it may concern;

UNITED STATES I JOHNB. GRIFFIN, or rAP'L'E HILL, ooNNnc'rIcUn v rnoivosnnrn.

I Specification of Letters Patent. Patented A g; 3,1920.

Appliciit-ion filed m 22, 1918. s m in; 246,022.:

vBe it known that I, JOHN-B. GRIFFIN,

acitizen of the United States, residing at Maple Hill, county of Hartford, State of Connecticut, haveinvented a certain new.

and useful Improvement in Phonographs, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilledinthe art to which itpertains tomake and usethe same, reference being bad to the accompanying draw-' in which form a. part of this specification; invention relates to phonographs It,

its object the automatic repetition of certain portions'of ajrecord whether music,

. speeclncor songfor even a repetition ofthe entire record an" indefinite number of times.

;ducing asstated. -,Figs. 2 and flare diagrammatic" views 1 n'-.

It consistsin the application of mechanism whereby such recorder suchv portion of a record may be --repeated automatically at will in combination; with-the record and driving mechanism as hereinafter described.

In the drawings: j. I v 1 1 Figure 1 'is' a plan view of a portiou'of a record andrnean's forautomatically reprodicating howthe amount of' the record re- .produced is determined.

' Figs; l and 5 are sectional diagrams-of a portion of the sustaining bar for holding the indicating roller and themeans whereby it is. allowed to oscillate, Fig. 5 is at rightanglesto that of Fig. -41.

Fig. 6 is an elevatio .show1ng the repeat ing mechanism its", active position.

. Fig. 7 is also the same figure except that 'the ,mechanism' is. shown in a position to begin the repeating action.

Fig. 8 is a detail figure of the mechanism which controls the raising .and lowering of is also a mechanism for the needleand shifting. 1

I Fig. 9 is ardetail of-th'e joint mechanismseparated so as to show the construction andopea'ation thereof. p a Figs. 10 and 11 are details ofthe exten .sion, trip mechanism.

Fig. 12 is a section on the line"1 2-12' f. Fi n' 12.

imilar indices refer to similar. parts.

1n. the drawings A represents va record .arm H. The roller S 'isxn'ormally held in .the position shown in- Fig. 6' where the about which there is nothing new. and which isv supposed to revolve inthe direction of the arrow. -l3fyis the arm which-carries theneedle which normally in contact with the.

end of the rod Q isrotatalilg ably engaged in a bearing angular offset Q This bearing K carries record to reproduce the sound. G i's'fa gooseneck. D isa' sound box. There is nothing new in the construction of the parts A, C and D and as their details form-no part of My device is attached to the goose-neck C i by means of a clamp E fastened by. a set my invention they need not be describedQ screw F. This clamp may besolid'but is" preferably made of two 'thin'. plates 'sep-' arated by studs and riveted together. The object of this is to make thedevice as light as possible but as it involves no principle of construction and mightas well be solid, it I -is not necessary to describe it further. 'Mounted on thisclamp at G is a rock-arm.

H. Thisrock-arm 'is'frot'atable on its pivot j G withfla jcertainrange-of motion. At one end is a sma'llgrooved roller J and at the other endthere is a yertical bearing shown 1nF1gs.f6'and 7, carrying an arm L upon whichis mounted a piston M sliding in an I air dashpot N. The upper endof this dashpot is fastened to and carried by an arm P which'i's also attached to the bracket E. The arm P carries a rotatable bearing as shown in section Figs.- 4 and-5 and through which slides a, rod Q. -This bearing is numbered ;P and is. carriedby a bolt P which is slotted forming lips 101.12 and hollowed out at the end to receive bearing P which is permitted to oscillate therein. The lower and alsoslid and carries an an arm L which in tllrn is pivoted to the arm H at L. This is shown in detail in Figs. 9

e and 12, Fig. 9 showing the parts dissected.

-ries piston -M shown in dotted lines'in Fig. 6. -At its extreme lower end the offset Q has fixedly attached to it .an axle R; This axle carries awsmall roller S made prefer ably of rubber. The roller S is pressed up against the bracketv Q by means of the spring T. It will be seen that by this means the roller Scan be set at. different angles by rotating the shaft Q and that it" may be elevated or lowered by means of the rock needleN is shown as operating uponlthe surface of the record the usual manner.

' respond to the curvature of'the record.-

and therefore effecting the proper result in such mechanism. In order to hold it in this gosition I have shown a weak spiral Spring whichis hooked into the rock-arm H at S and also into the bracket E at E. This creates a sli ht tension sufiicient to hold the rock-arm "together with the roller S in the position off from the record in the position shownjin Fig. 6. It will be understood that the shaft@ is longitudinally fixed but rotatable in the bearing in the bracket 1C Preferably the upper edge of this incline V swinging arm with its needle in its spiral is made in a knife edge form whereby it engages as the record rotates and when the convolutions has reached the position of the incline V it engages the roller upon the incline raising that end of the rock-arm H and brings the roller S down upon the record as it asses the apex of the triangular piece V. Ks the roller J rides up over the triangular piece V rocker arm H is actuated about point G lifting the sound box and needle off the record, this brin s the rearward end of the rocker arm If downward bringing roller S into contact with the surface of the record. The setting of the roller at an angle opening outward from the tangent of a radius from the center of the record through the axis of the roller will, while the roller is in contact with the record,

compel the needle of the goose-neck to travel outwardly without having the needle in con-' tact with therecord to such a distance as the angle of the roller with the tangent permits and while it is in contact with the record. This can be adjusted so as to carry the needle to the extreme edge of the record to begin the operation over again, in otherwords, repeat whatever the record is de-- signed to give. On the other hand, itmay be set so slightly or to such an angle as to shift. the needle to afford a repetition of an portion of the record. The spiral spring 5 during this time is exerting an upward force tending to draw roller'S off the record. This action of spiral spring S however is delayed by the slow escape of air from-the dashpot througlrad'ustable valve N. The rate-of escape of air rom the dashpot consequently measures I the time the roller is in contact with the record, and may be adjusted so as to make the contact merely momentary or prolong, it at-' will.

The telescopic arm U is easily fastened to the axle on which the record turns by placing it over it and turning up the set-screw at U thereby compelling the piece V to travel with the record. The telescopic arm U with the piece V may be set 'at any reasonable distance from. the center of the. record so that the repetition will occur at any point in the record.

In the drawings Figs. 2 and 3, Iliave shown how the roller will act while in contact with the record in its rotation under it.

In Fig. 3 the roller is set at an angle to; rapidly throw the arm B to which it is attached out to the extremity of the record whereas in Fig. 2 the angle being less would, show that the roller would not throw it out so far, this angle corresponding to an adjustment made by the roller support Q. r

The operation of these devices in general will be sufiiciently understood from the foregoin description.

W rat I claim is:

1. In combination with a phonograph reproducer, a detachable clamp adapted to be attached to the gooseneck of a phone graph reproducer arm, a perpendicular rod carried thereby vertically movable therein, a roller carried at the lower extremity of said rod, means for automatically bringing the roller into contact with the surface of the record, means for adjusting the roller so it will travel. outward on the record any desired distance, and means for automatically lifting ittherefrom.

2. In a phonograph repeating device, in combination with a detachable clamp adapted to be attached to a phonograph reproducer arm, a bearing carried by said detachable clamp, a vertical rod mounted in said bearing longitudinally slidable "therein and rotatably adjustable, a resilient roller carried at the lower extremity of sald rod, mechanisnt for automatically bringing said roller intocontact with the surface of the record coincident with. the lifting of the needle therefrom, and mechanism for automatically lifting said roller from the surface of the recordcoincident with the lowering of needle into contact with the surface of the record, submatically bringing said roller into'contact with the surface of the record, and mechanism for automatically lifting said roller from the surface of the record at any desired position.

4. In a detachable clamp adapted to be attached to the gooseneck of a phonograph reproducer arm, a vertical bearing carried thereby, a rod slidably mounted in said bearing and rotatable. therein, an offset extension on the lower extremity of said rod, a resilient roller' mounted on a horizontal axis carried atthe lower end of said offset extension; said rod, oifsct extension and roller carried thereby rotatable about the longitudinal axis of said vertical rod in said bearing.

5. In a detachable clamp adapted to. be attached to a phonograph re'prod'ucer arm, a verticalbearing mounted thereon, a lever horizontally mounted thereon, a vertical bearing carried by said lever and in perpendicular alinement with the other verti cal bearing, a rod slidably disposed in said bearings, an offset extension on the lower extremity of said rod, a resilient roller mounted on a horizontal axis carried by said offset extension, said rod being rotatable" about its longitudinal vertical 30 within said bearings, means for automatically lowering said rod bringing the roller into contact with the surface of the record, "means for automaticallyelevating sai d rod withdrawing the roller from contact with the surface of the record substantially as described. i

3. In a detachable clamp adapted to be attached to a phonograph reproducer arm, a vertical bearing mounted thereon, a lever horizontally mounted thereon, a vertical bearing carried bysaid lever and in perpendicular alinement with the other vertical bearing, a rod slidably disposed in said bearings, an offset. "extension on the lower extremity of said rod, a resilient roller mounted on a horizontal axis carried by said-,otl'set extension, means -for automati- 1 cally lowering said rod bringing the rollc'r into contact with the surface of the record, means for adjusting the roller so it will be carried outward by the revolution of the record any desired distance thereon.

7. in a detachable clamp adapted to be attached to a phonograph reproducer arm, a vertical bearing mounted thereon, a lever mounted thereon, a vertical bearing carried by said lever and in perpendicular alinement with the other vertical bearing, a rod slidably disposed in said bearings, an oil- 80 set extension on the lower extremity of said kind, a resilient roller mounted on a hori- 'Qzontal axis carried by said oflset extension, "said rod being rotatably disposed about its longitudinal vertical axis within said bearings, means for automatically lowering said rod bringing the roller into contact with the surface of the record, means for automatically elevating} said rod withdrawingthe roller from contact with the surface of the record, substantially as described.

8. In a detachable clamp adapted to be attached to a phonograph reproducer arm, avertical bearing mounted thereon, a lever mounted on a horizontal axis carried there by, a vertical bearing carried by said lever and in perpendicular alinement with the other vertical bearing, 'a rod disposed in said bearings vertically movable therein, a

resilient roller mounted on a horizontal axis carried by an offset extension at the lower extremity of said rod, said rod being rotatably disposed about its longitudinal vertical axis within said bearings, mechanism for automatically depressing the end of said lever on which is mounted the vertical bearing bringing the roller into contact with the surface of the record, alspring under eonstant tension when said/lever is depressed detachable clamp which is adapted to be attached to the reproducer arm of the phonograph, a resilient roller carried by a vertically disposed slidable rod rotatable about its vertical axis adapted to be actuated into contact with the surface of the record coincident with the riding of said grooved roller over said tripping head, and mechanism for automatically elevating said rod and roller.

10. In a repeating mechanism for a phonograph an adjustable telescopic arm carried by and rotatable with the axle of the record, a triangular Wedge shaped tripping head curved to substantially conform to the grooves of the record carried at the outer extremity of said ,telescopic arm, a horizon- Y 7 120 tally mounted lever on a detachable clamp adapted to be attached to the gooseneck of the reproducer arm, a grooved roller carried at one end of said lever adapted to automatically engage said tripping head, a resilient roller adapted to be actuated into contact with the surface of the record by the other end of said lever coincident therewith.

11. In a repeating mechanism for a phonograph, an adjustable telescopic arm carried by and rotatable with the aide of the record, a tripping head carried at the outer extremity of said arm, a horizontallymounted lever carried by a detachable clamp attached to the goose-neck of the reproducer arm, a grooved rollercarried b one arm of said lever, adapted to automatically engage said tripping head, a roller adapted to be actuated into contact with. the surface voi" the record by the constant downward movement of the opposite end of thelever from that of the grooved roller, a spring tension ed against such downward movement connecting said. lever to the detachable clamp.

12. In a phonograph, in combination with the reproducer arm, a roller mounted on a horizontal axis carried thereby, means for automatically bringing said roller into contact with the surface of the record coinciaxis of said roller with the radius of the record. 7

13. In a phonograph, a tripping deyice 0rd and rotatable therewith, a roller mounted on a horizontal axis carriediby'thei reproducer arm and adapted to support the" same when the needle is lifted from the record, means for automatically lifting said needle from the surface of the record by engagement of said means with the tripping device, means for adjusting the angle of said roller so it will travel outward on the surface of the record any;desired distance.

cation.

JOHN B. GRIFFIN.

'detachably mounted on the axle of the rec- In testimony whereof,I sign this specifi- 

